Xiaomi has been launched for 7 years, and its MIUI OS has also developed to eighth generation, which has enjoyed the great popularity among many mi fans. Although MIUI 8 can be best usable Chinese ROM until now, with more functions adding, it is a little redundant in fluency. MIUI 8 updated on those low-end mi phones is not excellent in fluency and battery life, and these will be the important direction for MIUI 9 to improve.
Just now, Xiaomi CEO Lei Jun claims that the goal of MIUI 9 is more stable, more fluent, and more power saving. So it seems Xiaomi has found this kind of questions after updating to MIUI 8 on some models. They will attempt to solve this kind of issues on MIUI 9.
Earlier the end of last year, MIUI 9 starts to prepare. According to practice, it should be released in August, 2017. Because MIUI 8 has been released in May, 2017, right now it is almost one year passing by, so we can’t exclude that MIUI 9 will be released with Xiaomi MI6 together. Stay tuned.